Abstract This article examines the phenomenon of the art therapy profession's recent migration to one country and the resulting acculturation process for the sojourner practitioner, the country of origin, and the profession itself. For their training, art therapists in Colombia must migrate to study at established international programs, bringing back professional knowledge upon their return. The acculturation process is illustrated with a case study of sojourner art therapists who implemented art therapy at a foster care institution for children in the care of the state in Colombia. The impact of the sojourner art therapist's re-acculturation process as it influenced treatment and the establishment of art therapy in Colombia is discussed, with implications for the assimilation of art therapy into new cultures.